public RadialGradientBrushImpl(Avalonia.Media.RadialGradientBrush brush, Size destinationSize)
{
var center = brush.Center.ToPixels(destinationSize);
var gradientOrigin = brush.GradientOrigin.ToPixels(destinationSize);
var radius = brush.Radius;
this.PlatformBrush = new RadialGradient(center.X, center.Y, radius, gradientOrigin.X, gradientOrigin.Y, radius);
foreach (var stop in brush.GradientStops)
{
((RadialGradient)this.PlatformBrush).AddColorStop(stop.Offset, stop.Color.ToCairo());
}
((RadialGradient)this.PlatformBrush).Extend = Extend.Pad;
}
/// <summary>
/// Initializes a new instance of the <see cref="RadialGradientBrushImpl"/> class.
/// </summary>
/// <param name="brush"></param>
/// <param name="target"></param>
/// <param name="destinationSize"></param>
public RadialGradientBrushImpl(
Avalonia.Media.RadialGradientBrush brush,
SharpDX.Direct2D1.RenderTarget target,
Size destinationSize)
{
if (brush.GradientStops.Count == 0)
{
return;
}
var gradientStops = brush.GradientStops.Select(s => new SharpDX.Direct2D1.GradientStop
{
Color = s.Color.ToDirect2D(),
Position = (float)s.Offset
}).ToArray();
var centerPoint = brush.Center.ToPixels(destinationSize);
var GradientOriginOffset = brush.GradientOrigin.ToPixels(destinationSize);
// Note: Direct2D supports RadiusX and RadiusY but Cairo backend supports only Radius property
var radiusX = brush.Radius;
var radiusY = brush.Radius;
using (var stops = new SharpDX.Direct2D1.GradientStopCollection(
target,
gradientStops,
brush.SpreadMethod.ToDirect2D()))
{
PlatformBrush = new SharpDX.Direct2D1.RadialGradientBrush(
target,
new SharpDX.Direct2D1.RadialGradientBrushProperties
{
Center = centerPoint.ToSharpDX(),
GradientOriginOffset = GradientOriginOffset.ToSharpDX(),
RadiusX = (float)radiusX,
RadiusY = (float)radiusY
},
new SharpDX.Direct2D1.BrushProperties
{
Opacity = (float)brush.Opacity,
Transform = PrimitiveExtensions.Matrix3x2Identity,
},
stops);
}
}